feat: 🎸 add checks to check if asset/account exists

[sansan]

Description

adds additional validation checks:

• checks if sending CA exists
• checks if receiving CA exists
• checks if provided confidential accounts exist

JIRA Link

https://polymesh.atlassian.net/browse/DA-1233

Checklist

• Updated the Readme.md (if required) ?

[polymath-eric]

I think data is something we should try to add in when we can. I find it helpful for debugging. Tests don't need to be updated, the code and message assertions should be enough.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[polymath-eric]

🎉 This PR is included in version 2.0.0-alpha.3 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[polymath-eric]

🎉 This PR is included in version 2.0.0-beta.1 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[polymath-eric]

🎉 This PR is included in version 2.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀